@article{li2021the,
  title = {The Impact of the Digital Economy on CO2 Emissions: A Theoretical and Empirical Analysis}
  author = {Li, Xiaoyan and Liu, Jia and Ni, Peijie},
  journal = {Sustainability},
  url = {https://www.mdpi.com/2071-1050/13/13/7267},
  year = {2021}
}